All of the major sentient species physically age at the exact same rate for the first 20 years of their lifespan. It is after this point that their unique physiology kicks in, and average growth rate/age varies between species:

Dur
Average: 200 years
Oldest Recorded: 250 years

Socially, most Dur are considered adults at the age of 50 even though they have physically been adults for 30 years by that point. Physically, Dur are at their prime at the age of 100 and begin to reach physical decline by the age of 150.

Nisse
Average: 350 years
Oldest Recorded: 500 years

Nisse are considered adults upon attaining the cultural marking which can (on average) be anywhere between the ages of 16 and 30. Physically, Nisse are at their prime at the age of 75 and begin to reach physical decline by the age of 325.

Humans
Average: 55 years
Oldest Recorded: 110 years

Humans are considered adults by the age of 16. Physically, Humans are at their prime at the age of 25 and begin to reach physical decline by the age of 50. Humans have the overall second lowest average life expectancy because they tend to fall victim to disease far easier than the other species. This is compounded by the fact that most common people work long hours in terrible factory conditions.

Goblinites (Gnomes, Kobolds, Halflings)
Average: 45 years
Oldest Recorded: 90 years

Goblinites are generally considered adults by the age of 16. Physically, Goblinites are at their prime at the age of 20 and begin to reach physical decline by the age of 40. However, Goblinites have the overall lowest average life expectancy because they tend to have very harsh lifestyles and live in remote and dangerous parts of the world (especially Gnomes); an ironic twist, as most Goblinites tend to be heartier than their non-goblin parent.

Homunculi
Average: Unknown
Oldest Recorded: 50 years (and counting)

Homunculi were invented 50 years ago, and none have died of natural causes yet. It is unclear if they age at all, but they can be killed. However, as killing a Homunculi is considered destruction of private property of the most grievous kind due to their value as workers and potential as heirloom servants between generations.

Goblins
Average: 120 years
Oldest Recorded: 650 years

Goblins do not age the same way the other species do. In fact most theorize that Goblins do not age at all, they just become more corpulent as time progresses. The oldest goblins seem to have died due to “unfortunate accidents” and the ravages of war more than known "natural causes".

Orcs
Average: 40 years
Oldest Recorded: 60 years

Orcs are very warlike and fight amongst each other as often as they do with other species. The above lifespans are for Orcs based on historical documents. No one is sure if there is any physiological difference between the Orcs of Calydon and Lerna and those of Antioch.